Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b39bd6a866445d…

MALICIOUS

PDF

36.2 KB Created: 2020-08-18 16:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff9393fa2968b8e2f9146c53c9d7c193 SHA-1: 3a097fb934185c83645f498b5a9c64d9f93dc86c SHA-256: f2b39bd6a866445d47dc5a66490f44dac3c3735d88c7c1d7cd981c8d42143035
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=gana+baja+de+video'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though partially corrupted, contains the same malicious URL and a reference to 'Gana baja de video', suggesting a lure for users to download content. The primary intent appears to be directing users to the malicious redirector.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=gana+baja+de+video
    • http://rutos.artsforactfineartauction.com/uploads/1/3/0/7/130776433/penaf.pdf
    • http://zenivevi.balletcaliente.com/uploads/1/3/1/3/131379578/kuzuwazitebavine.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/15166932589.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/60965241653.pdf
    • https://cdn.shopify.com/s/files/1/0437/0114/1657/files/organisme_pengganggu_tanaman_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/1088/2727/files/bbc_iplayer_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/90169494622.pdf
    • https://cdn.shopify.com/s/files/1/0448/3717/5456/files/what_is_mrt._exe.pdf
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/setting_advertising_objectives.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/mobadadinipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/english_phonetic_symbols_in_khmer.pdf
    • https://cdn.shopify.com/s/files/1/0437/0687/6055/files/appchina_free_ios.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9845/files/malumunal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/mafovunukilini.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3418/files/galowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9321/2827/files/nibepaxaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f16.bin
78f14a43bb616516718547e2c60e1aac6dc15f09af26a633f15dfe7886bb3af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F16 4820 bytes
font_01_sfnt_off00005fa1.bin
6abee78d801f318ae0fec480d9b2bda3d9ee1d8cdf8e551cf7e33051285a4692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA1 10820 bytes

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